Quick answers
- Which hospitals does Thomas B. Knowles work at?
- Medicare's official clinician data lists Thomas B. Knowles at 5 hospitals: Legacy Emanuel Medical Center, Legacy Good Samaritan Medical Center, Legacy Mount Hood Medical Center, Legacy Salmon Creek Medical Center and Samaritan Pacific Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas B. Knowles see patients?
- Medicare's clinician data lists 2 practice locations, including Portland, OR and Saint Helens, OR. Call before your visit to confirm the address.
- What is Thomas B. Knowles's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Thomas B. Knowles accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas B. Knowles accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Thomas B. Knowles offer telehealth?
- Medicare's clinician data says Thomas B. Knowles offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Thomas B. Knowles?
- (503) 413-5525, as listed in official Medicare / NPI Registry data.
- What is Thomas B. Knowles's NPI number?
- 1114337466. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Thomas B. Knowles works
Medicare's Facility Affiliation Data lists Thomas B. Knowles at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Legacy Emanuel Medical CenterPortland, OR · Acute Care Hospital · CCN 380007
- Legacy Good Samaritan Medical CenterPortland, OR · Acute Care Hospital · CCN 380017
- Legacy Mount Hood Medical CenterGresham, OR · Acute Care Hospital · CCN 380025
- Legacy Salmon Creek Medical CenterVancouver, WA · Acute Care Hospital · CCN 500150
- Samaritan Pacific Community HospitalNewport, OR · Critical Access Hospital · CCN 381314
Practice locations
Addresses where Thomas B. Knowles is enrolled with Medicare (CMS data updated 2026-10-02).
- 1130 NW 22nd Ave, Suite 500Portland, OR 97210 (503) 413‑5525
- 475 S Columbia River Hwy, Suite 100Saint Helens, OR 97051 (888) 784‑2505
Group practices
Medicare enrollment lists Thomas B. Knowles as a member of this group (CMS data updated 2026-10-02).
- Legacy Clinics LLC713 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Portland
Clinicians with the same Medicare primary specialty in Portland, OR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Creighton University School Of Medicine |
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1114337466 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians